title: Retroperitoneal extension type acute necrotic pancreatitis.
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D006470:Hemorrhage / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009336:Necrosis; D010195:Pancreatitis / Q000473:pathology / Q000601:surgery*; D012187:Retroperitoneal Space